Display screen with an animated graphical user interface



FIG. 1 is a first image in a sequence for a display screen with an animated graphical user interface showing the new design; and,

FIG. 2 is a second image thereof.

The broken lines outside the display screen show an electronic device having the display screen and form no part of the claimed design. The broken lines within the display screen show portions of the graphical user interface that form no part of the claimed design. The broken lines illustrating a hand form no part of the claimed design.

The appearance of the transitional image sequentially transitions between the images shown in FIGS. 1-2. The process or period in which one image transitions to another forms no part of the claimed design. 

CLAIM I claim the ornamental design for a display screen with an animated graphical user interface, as shown and described. 